JP4191619B2 - Cushion pad - Google Patents

Description

  The present invention relates to a cushion pad used as a cushion material for a vehicle seat such as an automobile.

  Some automobile seats incorporate a seat-like seating sensor that detects the seating of an occupant, for example, in order to prevent malfunction of an air bag in a passenger seat. Some have a built-in sheet heater for keeping the seating surface warm. When a functional sheet such as a seating sensor or a heater is disposed between the concave housing portion formed on the upper surface of the automobile seat and the skin, the functional sheet feels a foreign object when seated, or the functional sheet May appear on the outside and impair the appearance, and the functional sheet may be damaged by the seating pressure.

In order to solve such problems, a hole is provided upward from the bottom surface of the soft pad body, and a small pad of soft material is inserted into this hole, and a sensor is installed on the upper surface portion of the soft material. And the technique of hold | maintaining a soft material in a hole by narrowing the lower end of the said hole is disclosed (patent document 1).
JP 11-34710 A

  However, in the technique disclosed in Patent Document 1, since the lower end of the hole is narrowed to hold the small pad in the hole of the pad body, there is a problem that it is difficult to attach the small pad to the pad body. When the seating sensor is attached to the upper surface of the small pad in advance, the seating sensor may come off from the small pad due to compression deformation at the time of insertion, or the position may be displaced. Moreover, in such a structure, since a hole formation part is an undercut shape, there exists a problem that a pad main body is hard to shape | mold.

  The present invention has been made in view of the above-described problems, and a functional pad such as a seating sensor is disposed in the pad by mounting the small pad in the accommodation space of the pad body, and the small pad is accommodated. An object of the present invention is to provide a cushion pad that is easy to install in a space and is difficult to drop off after installation and further improves the soft feeling of the pad.

The cushion pad of the present invention comprises a pad main body made of a soft foam and a small pad made of a soft material mounted in a concave housing space provided on the bottom surface of the pad main body. The upper surface of the small pad and the housing In the cushion pad in which the sheet-like body is disposed between the ceiling surface of the space, a gap is formed between the side wall of the receiving space of the pad body and the side surface of the small pad, and the side wall is formed on the side wall of the receiving space. A concave groove or a ridge extending upward from the lower end portion is provided, and the small pad is fitted to the side surface of the small pad while being compressed with at least a part of the concave groove or the wall surface of the convex space of the housing space. ridge or groove is provided for holding in the housing space, said pad body and said contact only a small pad with ridges and grooves, the gap is set at the circumferential surface of the other of said small pad It is characterized in that is.

  According to the cushion pad of the present invention, by forming a gap between the side wall of the accommodation space and the outer periphery of the side surface of the small pad, the small pad can be easily inserted into the accommodation space. By allowing the pad to deform, the pad is softened and the cushioning property is improved. Furthermore, by providing a concave groove and a ridge that fit at least a part of the wall surface under compression on the side wall and the side surface of the small pad, the holding force of the small pad is enhanced by the repulsive force of both, and the positioning is performed. The functional sheet is securely disposed by preventing the drop off.

  In the cushion pad of the present invention, the groove bottom or the top of the groove of the concave groove of the housing space and the top of the convex or the groove of the small pad are fitted to each other while being compressed, and the small It is preferable that the pad is held in the housing space, and the small pad can be held by minimizing deformation due to compression of the housing space and the concave grooves and ridges of the small pad, thereby facilitating the mounting of the small pad. Keeping the shape of the cushion pad does not affect the cushioning and the function of the functional sheet.

  In the cushion pad of the present invention, it is preferable that the housing space has a substantially rectangular horizontal cross section, and the concave grooves or the ridges are provided on at least a pair of opposing side walls.

  As a result, the positioning and retention of the small pad are improved, and further, the concave grooves or the ridges are provided on both the front, rear, left and right side walls, thereby enabling accurate positioning in the front, rear, left and right. The pad holding effect is further enhanced.

  The cushion pad of this invention can be used for vehicle seats, such as a motor vehicle, as a seat with a function, when the said sheet-like body is functional sheets, such as a seating sensor and a heater.

  According to the cushion pad of the present invention, it is easy to mount a small pad inside the accommodation space of the pad body, and it is difficult to drop off after mounting, so a functional seat such as a seating sensor is easily and securely disposed in the cushion pad. Moreover, the cushioning of the vehicle seat can be improved by softening the pad.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an exploded perspective view of a seat pad 10 for an automobile according to an embodiment, FIG. 2 (a) is a sectional view of the seat pad 10 in the front-rear direction, FIG. 1 (b) is an exploded view thereof, and FIG. FIG. 4 is a bottom view of the seat pad 10, FIG. 5 is a bottom view of the pad main body 14, and FIG. 6 is a bottom view of the small pad 16.

  The seat pad 10 is a cushion pad used for a seat surface portion of an automobile, and is a seat pad with a seating sensor incorporating a pressure-sensitive seat-like seating sensor 12 for detecting the seating of an occupant. The seat pad 10 includes a pad main body 14 and a small pad 16 formed separately from the pad main body 14 for disposing the seating sensor 12 therein.

  The pad main body 14 is a foam molded body made of a flexible polyurethane foam formed by injecting a polyurethane foam raw material into a mold, and a concave accommodation space 18 is formed on the bottom surface thereof. The accommodating space 18 is a seating portion 20 at the center in the width direction of the pad main body 14, and is provided below the bottom bottom portion 22 at the rear from the center in the front-rear direction, and upward from the bottom surface of the pad main body 14. It is recessed. The storage space 18 has a substantially rectangular horizontal section defined by front and rear and left and right side walls 24, 26, 28, and 30, and the front and rear side walls 24 and 26 are loose so that they become wider toward the bottom. The left and right side walls 28 and 30 are erected substantially perpendicular to the ceiling surface 32.

  The small pad 16 is made of a foamed product of flexible urethane foam similar to the pad main body 14, and is small between the side surfaces 40, 42, 44, 46 and the side walls 24, 26, 28, 30 of the housing space 18. The outer periphery of the side surface of the small pad 16 is formed smaller than the inner periphery of the accommodating space 18 so that gaps 25, 27, 29, and 31 that facilitate insertion when the pad 16 is mounted are formed.

  The gaps 25, 27, 29, 31 are space portions in which the small pad 16 can be easily attached and detached between the side surfaces 40, 42, 44, 46 of the small pad 16 and the side walls 24, 26, 28, 30 of the receiving space 18. It is preferable that the small pad 16 is deformed so as to fill the gap when seated, and an appropriate soft feeling is obtained, and the gap is provided with an interval of about 1 to 10 mm.

  The urethane foam forming the small pad 16 may have the same composition as the pad main body 14 or may have a composition different in hardness, density, and the like. Moreover, not only such a foaming body of a flexible urethane foam but various soft materials, such as a chip urethane, can also be used.

  A pressure-sensitive seat-type seating sensor 12 for detecting an occupant seated on the seat pad 10 is bonded and fixed to the upper surface 34 of the small pad 16. By mounting the small pad 16 provided with the seating sensor 12 in the housing space 18, the seating sensor 12 is disposed between the small pad 16 and the ceiling surface 32 of the housing space 18, and the wiring 36 thereof. Is drawn rearwardly from the rear space 27 along the upper surface of the small pad 16 and has a terminal 38 at its tip. The seating sensor 12 may be bonded and fixed in advance to the ceiling surface 32 of the accommodation space.

  The left and right side walls 28 and 30 facing each other in the accommodation space 18 of the pad main body 14 are each provided with two ridges 50 protruding inward. The ridge 50 extends from the lower end opening of the housing space 18 to the upper ceiling surface 32, is formed with a substantially semicircular cross section of the ridge 51, and is opposed to the left and right side walls 28, 30. Thus, the positions in the front-rear direction are the same.

  On the other hand, the small pad 16 is provided with two concave grooves 52 extending in the vertical direction on the left and right side surfaces 44 and 46 so as to be fitted to the ridges 50. The groove 52 has a groove width slightly larger than that of the ridge 50 and the groove bottom 53 is formed in a substantially rectangular shape, and the groove depth is such that the top 51 and the groove bottom 53 of the ridge 50 are formed. It is formed to a depth that compresses while pressing each other. That is, the height of the top 51 of the ridge 50 is formed higher than the depth of the groove bottom 53.

  Thereby, when the small pad 16 is mounted in the accommodating space 18 of the pad main body 14, the top 51 of the ridge 50 and the groove bottom 53 of the concave groove 52 are fitted in a state where they are compressed, and the pad main body 14 is small. The pad 16 is held by the repulsive force of both from the left and right sides to prevent positioning and dropping of the small pad 16 after mounting.

  Moreover, since the ridges 50 and the grooves 52 are provided along the insertion direction of the small pad 16, there is no obstacle during insertion. Moreover, since it contacts only on the top part 51 of the protruding item | line 50 and the groove bottom 53 of the recessed groove 52, and the clearance gap is provided in other peripheral surfaces, the small pad 16 can be inserted easily and the protruding item | line 50 of The deformation of the top 51 and the groove bottom 53 of the concave groove 52 due to compression is partial and does not affect the surrounding pad shape, and the seating sensor 12 adhered to the upper surface of the small pad 16 is dropped or positioned. There will be no deviation.

  Further, in the present embodiment, the left and right sides of the small pad 16 are sandwiched and held by the two protrusions 50 provided on the left and right side walls 28 and 30 of the accommodation space 18, respectively. The holding force due to compression between the groove bottoms 53 of the concave grooves 52 is evenly applied, and positioning in the front-rear direction can be ensured and the holding effect of the small pads 16 can be enhanced.

  7 and 8 show modified examples of the arrangement of the ridges 50 and the grooves 52. In the example of FIG. 7, protrusions 50 are provided at two opposing positions of the left and right side walls 28, 30 of the accommodation space 18 and one opposing position of the front and rear side walls 24, 26. In the example of FIG. 8, the ridges 50 are provided only at two opposing positions of the front and rear side walls 24, 26 of the accommodation space 18, and the left and right side walls 28, 30 are not provided with ridges. On the side of the small pad 16, a concave groove 52 is provided corresponding to the ridge 50.

  In this way, it is preferable to provide a plurality of protrusions 50 and grooves 52 on the opposite side walls and side surfaces in order to enhance the positioning and holding effect of the small pad 16 in the front-rear and left-right directions. It is necessary to provide the small pad 16 from the left and right or front and rear with an equal holding force.

  In the above description, the protrusion 50 is provided on the pad body 14 side and the groove 52 is provided on the small pad 16 side. Conversely, the groove 52 is provided on the pad body 14 side and the protrusion 50 is provided on the small pad 16 side. In addition, the cross-sectional shape of the top of the ridge 50 and the shape of the groove bottom of the groove 52 are not limited to the semicircular shape or the substantially rectangular shape as described above.

  The surface of the seat pad 10 is generally covered with a skin such as a woven fabric or a knitted fabric, and is further mounted on a metal frame to form a vehicle seat. In the present invention, the skin is particularly bonded and bonded to the pad surface. It is effective for skin-adhesive type seat pads. In the case of a skin-adhesive seat pad, the skin is thin and the seating sensor 12 is not embedded in the pad so as to feel a foreign object or to reduce the appearance. can do.

  In the above embodiment, the case where the seating sensor is embedded has been described. However, the present invention can be similarly applied to the case where the heater is embedded. It can use for a vehicle seat using the functional sheet which has these.

It is a disassembled perspective view of the seat pad which concerns on one Embodiment of this invention. It is the longitudinal cross-sectional view of the seat pad of the front-back direction, (a) is a state at the time of small pad mounting | wearing, (b) shows the state before mounting | wearing. It is the longitudinal cross-sectional view of the left-right direction of the seat pad. It is a bottom view of the seat pad. It is a bottom view of the pad main body of the seat pad. It is a bottom view of the small pad of the seat pad. It is a bottom view of the pad body showing a modification of the seat pad. It is a bottom view of the pad main part which shows the other modification of a seat pad.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Seat pad 12 ... Seating sensor 14 ... Pad main body 16 ... Small pad 18 ... Accommodating space 24, 26, 28, 30 ... Side wall 25, 27, 29, 31 of pad main body 25 ... Gap 40, 42, 44, 46 …… Side surface of small pad 32 …… Ceiling surface of housing space 34 …… Top surface of small pad 50 …… Surve 52

Claims (4)

A pad body made of a flexible foam and a small pad made of a soft material mounted in a concave housing space provided on the bottom surface of the pad body, and between the upper surface of the small pad and the ceiling surface of the housing space In the cushion pad that arranges the sheet-like body on,
While forming a gap between the side wall of the storage space of the pad body and the side surface of the small pad,
A concave groove or a ridge extending upward from the lower end of the side wall is provided on the side wall of the housing space, and the side surface of the small pad is mutually compressed with at least a part of the concave groove or the ridge wall surface of the housing space. Are provided with a ridge or groove to fit and hold the small pad in the accommodation space ,
The cushion pad, wherein the pad main body and the small pad are in contact with each other only at the ridge and the groove, and the gap is provided on the other peripheral surface of the small pad. The groove bottom of the concave groove or the top of the ridge of the housing space and the top of the convex ridge of the small pad or the groove bottom of the concave groove are fitted to each other while being compressed to hold the small pad in the housing space. The cushion pad according to claim 1, wherein: 3. The cushion pad according to claim 1, wherein the housing space has a substantially rectangular horizontal cross section, and the concave grooves or the ridges are provided on at least a pair of side walls opposed to each other. The cushion pad according to any one of claims 1 to 3, wherein the sheet-like body is a functional seat such as a seating sensor or a heater.

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